Workers attempt to dry the court after play was suspended because of rain during a match between Rafael Nadal of Spain and Fernando Gonzalez of Chile at the U.S. Open tennis tournament in New York, Thursday, Sept. 10, 2009.
Carly Gullickson, right, of the United States and her partner Travis Parrott, also of the U.S., hold up their trophy after defeating Leander Paes, left, of India, and Cara Black, of Zimbabwe, in the mixed doubles championship at the U.S. Open tennis tournament in New York, Thursday, Sept. 10, 2009. Parrot and Gullickson won in straight sets.
Serena Williams, left, of the U.S., watches as her sister Venus returns a shot to Alisa Kleybanova, of Russia, and Ekaterina Makarova, of Russia, during their doubles match at the U.S. Open tennis tournament in New York, Thursday, Sept. 10, 2009.
Rafael Nadal's cleched fist is visible behind his racket during his match with Fernando Gonzalez of Chile at the U.S. Open tennis tournament in New York, Thursday, Sept. 10, 2009.
Juan Martin del Potro, of Argentina, reacts afer missing a point against Marin Cilic, of Croatia, during their match at the U.S. Open tennis tournament in New York, Thursday, Sept. 10, 2009.
Roger Federer of Switzerland returns to Robin Soderling of Sweden in their quarterfinal match at the U.S. Open tennis tournament in New York on Sept. 9, 2009. Federer won 6-0, 6-3, 6-8, 8-6 to reach the semifinals.
Yanina Wickmayer, of Belgium, reacts after winning a point over Kateryna Bondarenko, of Ukraine, during their match at the U.S. Open tennis tournament in New York, Wednesday, Sept. 9, 2009. The 50th-ranked Wickmayer, never before past the second round at a major tournament beat Kateryna Bondarenko of Ukraine 7-5, 6-4.
Kateryna Bondarenko, of Ukraine, prepares to serve to her opponent Yanina Wickmayer, of Belgium, during their match at the U.S. Open tennis tournament in New York, Wednesday, Sept. 9, 2009.
Caroline Wozniacki, of Denmark, grimaces as she returns a shot to Melanie Oudin, of the United States, during their match at the U.S. Open tennis tournament in New York, Wednesday, Sept. 9, 2009. Wozniacki won 6-2, 6-2.
Melanie Oudin, of the United States, returns a shot to Caroline Wozniacki, of Denmark, during their match at the U.S. Open tennis tournament in New York, Wednesday, Sept. 9, 2009.
Novak Djokovic, of Serbia, reaches out to return a shot from Fernando Verdasco, of Spain, during their match at the U.S. Open tennis tournament in New York, Wednesday, Sept. 9, 2009. Djokovic, who eliminated Verdasco 7-6 (2), 1-6, 7-5, 6-2.
Rafael Nadal of Spain reacts after beating Gael Monfils of France 6-7 (3), 6-3, 6-1, 6-3 during the quarterfinals of the U.S. Open tennis tournament in New York, Tuesday, Sept. 8, 2009.
Kim Clijsters of Belgium grimaces as she returns a backhand to Li Na of China during the quarterfinals of the U.S. Open tennis tournament in New York, Tuesday, Sept. 8, 2009.
Serena Williams of the United States celebrates after beating Flavia Pennetta of Italy 6-4, 6-3 during the quarterfinals of the U.S. Open tennis tournament in New York, Tuesday, Sept. 8, 2009.
Fernando Gonzalez of Chile returns to Jo-Wilfried Tsonga of France at the U.S. Open in New York Tuesday, Sept. 8, 2009. Gonzalez won 3-6, 6-3, 7-6(3), 6-4.
Andy Murray of Britain, right, returns a shot to Marin Cilic of Croatia during the quarterfinals of the U.S. Open tennis tournament in New York, Tuesday, Sept. 8, 2009.
Novak Djokovic of Serbia reacts during the third set against Radek Stepanek of the Czech Republic during their match at the U.S. Open tennis tournament in New York, Monday, Sept. 7, 2009. Djokovic won in straight sets 6-1, 6-3, 6-3.
Caroline
Melanie Oudin of the United States reacts during her match against Nadia Petrova of Russia at the U.S. Open tennis tournament in New York, Monday, Sept. 7, 2009. Oudin upset Nadia Petrova of Russia 1-6, 7-6(2), 6-3.
Fernando Verdasco of Spain returns to John Isner of the United States at the U.S. Open tennis tournament in New York, Monday, Sept. 7, 2009. Verdasco defeated John Isner, 4-6, 6-4, 6-4, 6-4.